Vijnana Bhairava Tantra
तन्त्र्यादिवाद्यशब्देषु दीर्धेषु क्रमसम्स्थितेः । अनन्यचेताः प्रत्यन्ते परव्योमवपुर्भवेत् ॥ ४१ ॥
When one-pointed awareness on the prolonged inner sounds of different musical instruments, such as stringed, wind and percussion, is gradually established, in the end the body becomes the supreme space.
english translation
tantryAdivAdyazabdeSu dIrdheSu kramasamsthiteH । ananyacetAH pratyante paravyomavapurbhavet ॥ 41 ॥
hk transliteration by Sanscript